Featured items

This pair of rare Reseda Green Atma-Sphere M-60 Mk.III monoblock amplifiers has been freshly serviced & upgraded to a Mk.III+ specification by Bill Layer, former Atma-Sphere Quality Control technician. A set of Speltz ZERO™ Autoformers is also included.

The early 1990s Type II Ei KT90 power tubes in this precisely matched octet were made in the former Yugoslavia. They have welded gray plates and dual O getters. Tubes test as new and are matched for both current draw (mA) and transconductance (Gm).

The GE 6L6GC power tubes in this premium matched quad have gray plates, dual side getters, black bases, and the 188-5 factory code (Owensboro, Ky). Tubes test as new and are precisely matched for both current draw (mA) and transconductance (Gm).

The 1959 Amperex EL34 / 6CA7 power tubes in this precisely matched pair have dual D getters and brown bases (Xf4 series). The white labels on the base have the GE logo, Both tubes test as new and and are matched for current draw (mA) and Gm.

The 1960 Tung-Sol 6550 power tubes in this precisely matched pair have welded gray plates with no holes, 3 getters, metal collar bases, and the distinctive coke bottle shape. The white print on the base has the Tung-Sol logo. Click "more info" for details

The 1950s RCA 5691 tubes in this precisely matched pair are a premium 6SL7 tube type--and an audiophile favorite. They have short bottles, distinctive red bases, triple micas and 11 support rods. Both tubes test as new with balanced sections.

The 1967-68 Amperex 12AX7 / ECC83 tubes in this precisely matched pair have gray plates and halo getters (I65 series). The Heerlen, Holland factory codes are etched in the glass. Both tubes test as new with phono grade noise levels.

The 1970s GE 6FQ7 / 6CG7 tubes in this precisely matched quad have halo getters and gray plates with copper grid posts and reflective shields. The white labels have the GE logo. All 4 tubes test as new and are matched for both mA and Gm.

This rare 1960s Philips 6V6GT tube was made in Holland. It has a bottom dish getter and black glass. The yellow label on the glass has the Realistic logo and reads "made in Holland." Tube tests as new.

This rare 1962 Siemens ECC82 / 12AU7 tube has distinctive chrome plates with copper grid posts. Its halo getter has two support posts. The white label has the Artisan logo and the Munich factory code is etched in the glass. Tube tests as new.

The 1960s Telefunken 12AX7 / ECC83 tubes in this precisely matched pair have smooth plates and the diamond imprint in the base. The white labels have the Fisher logo. Both tubes test as new with balanced sections and phono grade noise levels.

The ElectroHarmonix 6H30Pi tube is a super linear, military spec dual triode tube made in Russia. It has the same internal construction as the Sovtek 6H30Pi, except the EH 6H30Pi has gold pins and has been selected for tighter tolerances and lower noise.

TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.